A baby can sleep in a full-size crib from birth, and most parents transition their baby out of a bassinet and into a crib between 3 and 6 months old — or as soon as the baby reaches the bassinet's weight or size limit.
The specific transition point depends on two factors: the bassinet's stated weight limit (typically 15–20 lbs) and whether the baby is showing signs of rolling or pushing up, which make a lower-sided bassinet less appropriate. A crib's deeper, fixed sides remain safe and functional from newborn stage through toddlerhood — usually up to 35 inches tall or around age 3, whichever comes first. The AAP recommends a firm, flat sleep surface at every stage, which a full-size crib mattress is designed to provide.
- Typical bassinet-to-crib transition age: 3–6 months, or at 15–20 lbs (bassinet weight limit).
- Full-size cribs are designed for use from birth through approximately 35 inches in standing height.
- The HOMMOW 5-in-1 bassinet converts to a standalone crib configuration, extending usable life beyond the bassinet stage.
- AAP safe sleep standard: firm, flat, bare sleep surface — applicable to both bassinets and cribs.
- Crib-to-toddler-bed transition is typically recommended when a child reaches 35 inches tall or around age 3.